CVE-2026-68216

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> media: pwc: Return queued buffers on start_streaming() failure<br /> <br /> The vb2 framework hands buffers to the driver via buf_queue() before<br /> calling start_streaming(). If start_streaming() returns an error<br /> without first returning those buffers via vb2_buffer_done(),<br /> vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued<br /> buffers leak.<br /> <br /> pwc&amp;#39;s start_streaming() had two early returns that hit this trap:<br /> -ENODEV when the USB device was already disconnected, and -ERESTARTSYS<br /> when mutex_lock_interruptible() was interrupted by a signal. Call the<br /> existing pwc_cleanup_queued_bufs() helper with VB2_BUF_STATE_QUEUED<br /> before returning (matching the state already used by the<br /> pwc_isoc_init() error path in the same function).<br /> <br /> This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo:<br /> Return queued buffers on start_streaming() failure").